Recent Results from the Study of Emittance Evolution in MICE

Abstract

The Muon Ionization Cooling Experiment (MICE) has measured the change in emittance due to ionization energy loss. Large aperture solenoid magnets were used to focus muons through Lithium-hydride, liquid hydrogen and empty absorbers. Diagnostic devices were placed upstream and downstream of the absorber, enabling the phase-space coordinates of individual muons to be reconstructed. By observing the properties of ensembles of muons, the evolution of the beam emittance was studied. The phase-space was analysed using single particle amplitude distributions and shows a clear increase in the core density of the beam, a direct effect of ionization cooling.